CN1984246A - Camera - Google Patents
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- CN1984246A CN1984246A CN 200610060354 CN200610060354A CN1984246A CN 1984246 A CN1984246 A CN 1984246A CN 200610060354 CN200610060354 CN 200610060354 CN 200610060354 A CN200610060354 A CN 200610060354A CN 1984246 A CN1984246 A CN 1984246A
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- gear
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- transmission mechanism
- video camera
- rotates
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Abstract
The invention comprises: a first driving mechanism for driving the pick-up head of video camera to horizontally rotate; a second driving mechanism for driving the pick-up head of video camera to vertically rotate; a force application unit for applying a force on the pick-up head in horizontal rotation plane of the pick-up head; a second force application unit for applying a force on the pick-up head in the vertical rotation plane of pick-up head; the first force application unit is at least one spring; the second force application unit is a spring or a balance weight.
Description
Invention field
The present invention relates to a kind of video camera, in particular to a kind of video camera of high rotation precision.
Background technology
Nowadays, in the video conference terminal apparatus field, video camera is very important a kind of equipment.Under a lot of occasions, hope can horizontally rotate camera (PAN rotation) as required or vertically rotate (TILT rotation) and carry out presetting bit, and therefore the rotation precision to camera has very high requirement.
At present common video camera internal structure is all very complicated, and horizontally rotating (PAN rotation) or vertically rotating (TILT rotation) of camera driven by a PAN drive motors and a TILT drive motors respectively.The PAN drive motors drives camera through a PAN transmission mechanism and carries out the PAN rotation.The TILT drive motors drives camera through a TILT transmission mechanism and carries out the TILT rotation.Transmission mechanism is to utilize electric motor starting to rotate, and drives camera through actuated elements such as gear (or worm and gear) and synchronous bands and rotates.
Fig. 1 is the structural representation of the video camera 100 of prior art.As shown in the figure, the camera 150 of video camera 100 horizontally rotates (PAN rotation) or vertically rotates (TILT rotation) respectively by a PAN drive motors 101 and TILT drive motors 102 drivings.PAN drive motors 101 drives camera 150 through a PAN transmission mechanism 103 and carries out the PAN rotation.TILT drive motors 102 drives camera 150 through a TILT transmission mechanism 104 and carries out the TILT rotation.In existing video camera, transmission mechanism generally adopts gear or actuated element transmission such as worm and gear or synchronous band to rotate.
As previously mentioned, when adopting gear drive or being with transmission synchronously, because there is the gap in gear in engagement process, thus when reversing, gear will cause existing the retraction angle owing to the existence in gap, thus the control precision that influence is rotated camera.
And when adopting gear drive or being with transmission synchronously, because gear certainly exists the gap in engagement process, so will cause existing an idle running angle owing to the existence in gap when gear reverse, that is, the angle bounces back.Can influence the rotation control precision when camera carried out presetting bit like this.
For improving this control precision, must eliminate synchronous band transmission and gear-driven retraction angle as much as possible.The method that present industry is used always is as follows:
1. synchronously with transmission: the contact roller with the band spring compresses synchronous band, and the retraction angle of transmission is reduced to minimum.
2. gear drive: improve the precision of gear, reduce the angle that bounces back; Perhaps the centre-to-centre spacing of gear pair is set to adjustable.
These video camera internal structure complexity of the prior art, transmission mechanism is many, and transmission progression is more; Assembling is complicated, and efficiency of assembling is not high; Actuated element is many, may cause the inefficacy link many thus, the failure rate height.
Therefore, need a kind of solution of high rotation precision video camera, it can eliminate the retraction angle, improves the precision that video camera rotates, and simple in structure, is easy to assembling.
Summary of the invention
The objective of the invention is to provide a kind of retraction angle simple in structure, that the gear counter-rotating forms in the time of can eliminating rotation to improve the video camera that rotates control precision.
According to the present invention, a kind of video camera is provided, comprising:
Link to each other with the camera of video camera, and drive first transmission mechanism that it horizontally rotates;
Link to each other with the camera of video camera, and drive second transmission mechanism that it vertically rotates;
Described video camera also comprises following at least one force application element among both: first force application element, be used in the horizontal plane that camera rotates, camera being applied power, make its trend that rotation is arranged in this horizontal plane, and then described first transmission mechanism is applied power; Second force application element is used in the perpendicular that camera rotates camera being applied power, makes its trend that rotation is arranged in this perpendicular, and then described second transmission mechanism is applied power.
Preferably, described first force application element is a flexible member.Preferably, described second force application element is flexible member or counterweight.More preferably, described first force application element is at least one spring, and this at least one spring one end can rotate with camera and move, and the other end is fixed.More preferably, described video camera also comprises base and the disk that together rotates with camera, and described at least one spring one end is fixed on the described disk, and the other end is fixed on the described base.
Preferably, described second force application element is a counterweight, and this counterweight is arranged on an end of camera.
Preferably, described first transmission mechanism and/or second transmission mechanism are the gear reduction transmission mechanism.
More preferably, described first transmission mechanism comprises:
First drive motors;
First mainshaft gear by the driving of first drive motors;
First duplicate gear comprises a gear wheel and a pinion; And
Drive first load gear that camera horizontally rotates; Wherein, the gear wheel of first duplicate gear and the engagement of first mainshaft gear, the pinion of first duplicate gear and the engagement of first load gear.
More preferably, described second transmission mechanism comprises:
Second drive motors;
Second mainshaft gear by the driving of second drive motors;
Second duplicate gear comprises a gear wheel and a pinion; And
Drive second load gear that camera vertically rotates; Wherein, the gear wheel of second duplicate gear and the engagement of second mainshaft gear, the pinion of second duplicate gear and the engagement of second load gear.
Scheme as an alternative, at least one can be the tertiary gear reduction gearing mechanism in described first transmission mechanism and/or second transmission mechanism.
Horizontally rotating and vertically rotating all of camera in the video camera provided by the invention driven through gear drive or band transmission by motor, and be simple in structure, easy to assembly.Simultaneously,, eliminated the influence at gear drive retraction angle, improved the precision that camera rotates by adding spring or counterweight.
The accompanying drawing summary
Fig. 1 is the structural representation of the video camera of prior art;
Fig. 2 is the PAN structural representation according to the video camera of one embodiment of the invention, shows first transmission mechanism that camera is horizontally rotated;
Fig. 3 is the profile according to the PAN structure middle part subassembly of the video camera of the embodiment of the present invention;
Fig. 4 is the TILT structural representation according to the video camera of the embodiment of the present invention, shows second transmission mechanism that camera is vertically rotated.
Embodiment
In conjunction with the accompanying drawings the preferred embodiments of the invention are described in detail now.Should be understood that, concerning the one of ordinary skilled in the art, can carry out multiple change and/or change the inventive concept on basis.It is illustrative, and not restrictive that embodiment disclosed herein should be regarded as.
Fig. 2 is the PAN structural representation according to the video camera 200 of one embodiment of the invention.As shown in Figure 2, the video camera 200 of this high rotation precision comprises a camera 250.First transmission mechanism that the camera 250 of video camera 200 is horizontally rotated, promptly the PAN transmission mechanism is totally represented with 220.This first transmission mechanism 220 comprises first drive motors 201, first mainshaft gear 202 that is connected with the main shaft of first drive motors 201, as first duplicate gear 203 of intermediate drive gear, and with rigidly connected first load gear 204 of the rotating part of camera 250.Wherein, the gear wheel 203a engagement of first mainshaft gear 202 and first duplicate gear 203, the pinion 203b of first duplicate gear 203 and 204 engagements of first load gear, like this through the double reduction transmission, 204 drive cameras 250 horizontally rotate thereby motor 201 drives first load gear.
In the use, if desire horizontally rotates an angle with the camera of video camera, then start first drive motors 201 earlier, first mainshaft gear 202 that is driven on it by first drive motors 201 begins rotation.Because first mainshaft gear 202 is meshed with the gear wheel 203a of first duplicate gear 203, the axle that drives this duplicate gear 203 this moment rotates, and because of the gear wheel 203a number of teeth of first duplicate gear 203 the number of teeth, so the rotating speed of first duplicate gear 203 is less than the rotating speed of first mainshaft gear 202 greater than first mainshaft gear 202.And the axle of first duplicate gear 203 rotates the pinion 203b rotation that also drives simultaneously on first duplicate gear 203, this pinion again with rigidly connected first load gear 204 engagement of camera rotating part, so the rotation of pinion can drive first load gear 204 and drives cameras 250 and horizontally rotate.In the transmission of the second level, because the number of teeth of the pinion 203b of first duplicate gear 203 is less than the number of teeth of first load gear 204, so this second level transmission also is the gear reduction transmission.By this two-stage gear reduction transmission, the high rotating speed of motor is reduced to the slow-speed of revolution with the axle of rigidly connected first load gear 204 of camera, obtain to horizontally rotate the required moment of torsion of camera 250 simultaneously.
For eliminating the influence at the retraction angle of causing by gear backlash, the present invention adopts first force application element, be used in the horizontal plane that camera rotates, camera being applied power, make its trend that rotation is arranged in this horizontal plane, thereby on described first transmission mechanism 220, apply power.This first force application element can be an elastic element.Particularly, in the present embodiment, shown in the profile of the PAN structure division assembly of Fig. 2 and Fig. 3, camera 250 belows have and its disk that together rotates 206, and video camera 200 has a base 207, and in the disk bottom spring 205 is set.Base 207 and disk 206 can relatively rotate around axle 208.In position shown in Figure 2, on the direction of vertical paper, spring 205 is positioned at disk 206 following (or back) and can't sees.Therefore, spring 205 dots in Fig. 2.Spring one end is fixed on the static base 207, and the other end is fixed on the disk 206.As shown in Figure 3, spring 205 can be between disk 206 and base 207, around 205 one-tenth circular-arc layouts of axle.Spring 205 is provided in the scope of camera 250 rotations, and it is in extended state all the time, that is, when disk horizontally rotated with camera, it was in extended state; When camera was static, disk was static, and it also is in extended state.Because the effect of spring force is located at an arbitrary position, camera 205 all has the trend of rotation, so that the gear in first transmission mechanism 220 all is close to the same side engagement, thereby makes gear-driven gap can not influence the control precision that camera 250 rotates.So just eliminated the retraction angle.
Should be pointed out that spring 205 not necessarily will be by disclosed such in the present embodiment, two ends are separately fixed on base 207 and the disk 206.The one end can be fixed on arbitrary fixture, and the other end can be fixed on any parts that rotate together with camera, as long as can in the plane that camera 250 horizontally rotates, make camera that the trend of rotation is arranged, get final product thereby on first transmission mechanism 220, apply elastic force.The element that applies elastic force is spring not necessarily also, and can be any elastomer.This elastic force is the pulling force in the present embodiment not necessarily also, also can be thrust, and in this case, the parts of this applied thrust should be in compressive state all the time.
Now referring to Fig. 4, Fig. 4 is the TILT structural representation according to the video camera 200 of this embodiment of the present invention, wherein shows second transmission mechanism that camera is vertically rotated, and promptly the TILT transmission mechanism is totally represented with 320.As shown in Figure 4, the design of this second transmission mechanism 320 is similar to the design of above-mentioned first transmission mechanism 220, comprise second drive motors 301, second mainshaft gear, 302 (not shown) that are connected with the main shaft of second drive motors 301, as second duplicate gear 303 of intermediate drive gear, and with rigidly connected second load gear 304 of the rotating part of camera 250.Wherein, the gear wheel 303a of second mainshaft gear 302 and second duplicate gear 303 engagement, the pinion 303b of second duplicate gear 303 is meshed with load gear 304, and like this through the double reduction transmission, the motor-driven load gear drives camera and vertically rotates.
In the use,, then start second mainshaft gear 302 that second drive motors, 301, the second drive motors 301 drive on it earlier and begin rotation if desire is vertically rotated an angle with the camera of video camera.Because the gear wheel 303a of second mainshaft gear 302 and second duplicate gear 303 engagement, driving this second duplicate gear 303 this moment rotates, and because of the gear wheel number of teeth of second duplicate gear 303 number of teeth greater than second mainshaft gear 302, so the rotating speed of the axle of second duplicate gear 303 is less than the rotating speed of the electric machine main shaft of second mainshaft gear 202.And the axle of second duplicate gear 303 rotates the pinion 303b rotation that also drives simultaneously on second duplicate gear 303, this pinion 303b meshes again with rigidly connected second load gear 304 of camera rotating part, and the rotation of pinion 303b can drive second load gear, 304 drive cameras 250 and vertically rotate.In the transmission of the second level, because the number of teeth of the pinion 303b of second duplicate gear 303 is less than the number of teeth of second load gear 304, so this second level transmission also is the gear reduction transmission.By this two-stage gear reduction transmission, the high rotating speed of motor is reduced to the slow-speed of revolution with the axle of the rigidly connected load gear 304 of camera, obtain vertically to rotate the required moment of torsion of camera 250 simultaneously.
For eliminating the influence at retraction angle, as shown in Figure 4, the invention provides second force application element, be used in the perpendicular that camera rotates, camera being applied power, make its trend that rotation is arranged in this perpendicular, thereby on described second transmission mechanism 320, apply power.In this embodiment, the vertical rotating part of camera is carried out counterbalance design, near the front end of the vertical rotating part of camera 250, weight stack 305 is set, so that its front end slightly overweights the rear end, the vertical rotating part that makes camera 250 all has an eccentric moment at an arbitrary position the time when camera 250, this eccentric moment makes the vertical rotating part of camera that the trend of rotation is arranged all the time, like this at camera static or when rotating the gear in second transmission mechanism 320 all be close to the same side engagement, thereby make gear-driven gap can not influence the control precision that camera rotates.So just eliminated the retraction angle.
Should be pointed out that this counterweight 305 also can be arranged near the rear end of vertical rotating part of camera 250,, get final product thereby on second transmission mechanism 320, apply power as long as it can produce the trend that makes its rotation in the planes that camera 250 vertically rotates.With the PAN similar, the TILT structure also can adopt flexible member, and for example spring makes camera 250 that the trend of rotation be arranged, and applies elastic force on second transmission mechanism 320.This can reach the purpose that the gear that makes in second transmission mechanism 320 all is close to the same side engagement equally, thereby eliminates the retraction angle.
In this embodiment, two transmission mechanisms are two-stage gear reduction transmission mechanism.But persons of ordinary skill in the art may appreciate that the present invention is not limited to this, can change these two transmission mechanisms as required.For example, these two gear reduction transmission mechanisms all can be set to the tertiary gear reduction gearing mechanism, or any is set to the secondary gear reduction gearing mechanism in described two gear reduction transmission mechanisms, and another one is set to the tertiary gear reduction gearing mechanism.
Described spring more than two or two also can be set respectively in the PAN of described video camera structure or TILT structure as required, eliminate respectively that camera horizontally rotates and the gear counter-rotating forms when vertically rotating retraction angle.Similarly, also can adopt a plurality of weight stacks in the TILT structure, and counterweight also can adopt arbitrary shape, as sheet, bulk, ring-type or the like.
Though in conjunction with the accompanying drawings embodiment of the present invention are described, but be understandable that, above-mentioned embodiment is exemplary, and it is also nonrestrictive, for the one of ordinary skilled in the art, can carry out multiple change and/or modification without departing from the inventive concept of the premise, this kind change and or revise and to think within the application's open scope.
Claims (10)
1. video camera comprises:
Link to each other with the camera of video camera, and drive first transmission mechanism that it horizontally rotates;
Link to each other with the camera of video camera, and drive second transmission mechanism that it vertically rotates;
Described video camera also comprises following at least one force application element among both:
First force application element is used in the horizontal plane that camera rotates camera being applied power, makes its trend that rotation is arranged in this horizontal plane, and then described first transmission mechanism is applied power;
Second force application element is used in the perpendicular that camera rotates camera being applied power, makes its trend that rotation is arranged in this perpendicular, and then described second transmission mechanism is applied power.
2. video camera as claimed in claim 1 is characterized in that, described first force application element is a flexible member.
3. video camera as claimed in claim 1 is characterized in that, described second force application element is flexible member or counterweight.
4. video camera as claimed in claim 1 is characterized in that, described first force application element is at least one spring, and this at least one spring one end can rotate with camera and move, and the other end is fixed.
5. video camera as claimed in claim 4 is characterized in that, described video camera also comprises base and the disk that together rotates with camera, and described at least one spring one end is fixed on the described disk, and the other end is fixed on the described base.
6. video camera as claimed in claim 1 is characterized in that, described second force application element is a counterweight, and this counterweight is arranged on an end of camera.
7. video camera as claimed in claim 1 is characterized in that, described first transmission mechanism and/or second transmission mechanism are the gear reduction transmission mechanism.
8. video camera as claimed in claim 7 is characterized in that, described first transmission mechanism comprises: first drive motors;
First mainshaft gear by the driving of first drive motors;
First duplicate gear comprises a gear wheel and a pinion; And
Drive first load gear that camera horizontally rotates;
Wherein, the gear wheel of first duplicate gear and the engagement of first mainshaft gear, the pinion of first duplicate gear and the engagement of first load gear.
9. as claim 7 or 8 described video cameras, it is characterized in that described second transmission mechanism comprises:
Second drive motors;
Second mainshaft gear by the driving of second drive motors;
Second duplicate gear comprises a gear wheel and a pinion; And
Drive second load gear that camera vertically rotates;
Wherein, the gear wheel of second duplicate gear and the engagement of second mainshaft gear, the pinion of second duplicate gear and the engagement of second load gear.
10. claim 7 or 8 described video cameras is characterized in that, at least one is the tertiary gear reduction gearing mechanism in described first transmission mechanism and/or second transmission mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610060354 CN1984246A (en) | 2006-04-18 | 2006-04-18 | Camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610060354 CN1984246A (en) | 2006-04-18 | 2006-04-18 | Camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1984246A true CN1984246A (en) | 2007-06-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610060354 Pending CN1984246A (en) | 2006-04-18 | 2006-04-18 | Camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1984246A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101414041B (en) * | 2008-11-26 | 2011-12-21 | 华为终端有限公司 | Video camera |
| CN102333187A (en) * | 2011-09-29 | 2012-01-25 | 旗瀚科技有限公司 | Fixed hemisphere camera |
| CN102566602A (en) * | 2012-02-29 | 2012-07-11 | 天津天地伟业数码科技有限公司 | Method for promoting accuracy of preset position of dome camera |
| CN104374404A (en) * | 2014-11-06 | 2015-02-25 | 歌尔声学股份有限公司 | Test device and method for testing spiral swinging performance of work-piece |
| CN108387993A (en) * | 2016-04-01 | 2018-08-10 | 温州医科大学 | A kind of rotatable lens assembly and the tracking based on eye tracking technology |
| CN113669567A (en) * | 2020-05-15 | 2021-11-19 | 杭州海康威视数字技术股份有限公司 | Shooting angle adjusting device |
-
2006
- 2006-04-18 CN CN 200610060354 patent/CN1984246A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101414041B (en) * | 2008-11-26 | 2011-12-21 | 华为终端有限公司 | Video camera |
| CN102333187A (en) * | 2011-09-29 | 2012-01-25 | 旗瀚科技有限公司 | Fixed hemisphere camera |
| CN102566602A (en) * | 2012-02-29 | 2012-07-11 | 天津天地伟业数码科技有限公司 | Method for promoting accuracy of preset position of dome camera |
| CN104374404A (en) * | 2014-11-06 | 2015-02-25 | 歌尔声学股份有限公司 | Test device and method for testing spiral swinging performance of work-piece |
| CN104374404B (en) * | 2014-11-06 | 2017-12-19 | 歌尔股份有限公司 | A kind of test piece spiral swings the test device and method of performance |
| CN108387993A (en) * | 2016-04-01 | 2018-08-10 | 温州医科大学 | A kind of rotatable lens assembly and the tracking based on eye tracking technology |
| CN108387993B (en) * | 2016-04-01 | 2020-09-18 | 温州医科大学 | Rotatable lens device and tracking method based on eyeball tracking technology |
| CN113669567A (en) * | 2020-05-15 | 2021-11-19 | 杭州海康威视数字技术股份有限公司 | Shooting angle adjusting device |
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